42. Solving a chemistry problem
216. When constructing a calibration graph on a wedge polarimeter, the following data were obtained:
Quinine content, % 5 10 15 20 25 30
Polarimeter readings, mm 2.7 5.5 8.4 11.4 14.3 17.7
Determine the content of quinine if the readings on the scale are 10.3 and 15.8 mm.
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